<style scoped>
	.qrcode {
		width: 400rpx;
		height: 400rpx;
		padding-top: 240rpx;
		margin:0 auto;
		overflow: hidden;
		    display: flex;
		    justify-content: center;
	}
	.img {
		width: 400rpx;
		margin-top:260rpx;display: block;
	}
.btn {
	display: block;
	margin:0 auto;
	margin-top: 50rpx;
	width:300rpx;
}
.tip {
	width: 100%;
	text-align: center;
	display: block;
	color: #999;
	font-size: 22rpx;
	padding-top: 40rpx;
}
</style>
<template>
	<view>
		<uni-nav-bar class="bold" left-icon="back" title="查看通行码" fixed="true" shadow="false" @clickLeft="leftBack"></uni-nav-bar>
		<view class="qrcode" v-show="canvasShow">
			<canvas style="width: 200px; height: 200px;" canvas-id="myQrcode"></canvas>
		</view>
		<button @click="getQrHandle" class="btn" type="primary">刷 新</button>
		<text class="tip">温馨提示：请在有效预约时间内，刷码通行</text>
	</view>
</template>

<script>
	import { leftBack } from '../../commom/js/utils.js'
	import { getQr, getQrs } from '../../api/visitor.js'
	import drawQrcode from 'weapp-qrcode'
	export default{
		data() {
			return {
				screenBrightness: null,
				phone: null,
				name: null,
				canvasShow: true,
			}
		},
		methods: {
			leftBack() {
				uni.setScreenBrightness({
				    value: this.screenBrightness
				});
				leftBack()
			},
			getQr() {
			  if(this.phone) {
				  getQr({k: this.phone}).then(res => {
				  					  let qrcode_str = res.data
				  				  if(qrcode_str.code !== 0) {
				  				  	  uni.showToast({
				  				  	  	title: qrcode_str.msg,
				  				  		icon: 'none'
				  				  	  })
				  				    } else {
				  				  	let codeStr = this.encode(`${ qrcode_str.data.visitorId }_${ this.getVisitor_tel_name(true) }_${ this.getVisitor_tel_name(false) }`);
				  				  	this.getQrImg(codeStr)
				  				    }
				  })
			  } else {
				  this.yuyue_tip()
			  }
			},
			getQrHandle() {
				if(this.phone) {
					getQrs(this.phone).then(res => {
					let qrcode_str = res.data
					if(qrcode_str.code !== 0) {
						  if(qrcode_str.msg === '访客不存在') {
							  this.canvasShow = false;
							  this.yuyue_tip();
						  } else {
							  uni.showToast({
							  	title: qrcode_str.msg,
							  	icon: 'none'
							  })
						  }
					  } else {
						  this.canvasShow = true;
						  // uni.showToast({
						  // 	title: '已刷新'
						  // })
						  let codeStr = this.encode(`${ qrcode_str.data.visitorId }_${ this.name }_${ this.phone }`);
						  this.getQrImg(codeStr)
					  }
					})
				} else {
					this.yuyue_tip()
				}
			},
			getQrImg(str) {
				drawQrcode({
				  width: 200,
				  height: 200,
				  canvasId: 'myQrcode',
				  text: str,
				})
			},
			getVisitor_tel_name(x) {
				if(x) {
					return uni.getStorageSync('visitorName')
				} else {
				return uni.getStorageSync('visitorPhone')
				}
			},
			yuyue_tip() {
				uni.showToast({
					title: '请先填写预约信息',
				    icon: 'none'
				})
			},
		  encode(str){
			var Base64 = {
			    // private property
			    _keyStr: "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",
			
			    // public method for encoding
			    encode: function(input) {
			        var output = "";
			        var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
			        var i = 0;
			
			        input = Base64._utf8_encode(input);
			
			        while (i < input.length) {
			
			            chr1 = input.charCodeAt(i++);
			            chr2 = input.charCodeAt(i++);
			            chr3 = input.charCodeAt(i++);
			
			            enc1 = chr1 >> 2;
			            enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
			            enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
			            enc4 = chr3 & 63;
			
			            if (isNaN(chr2)) {
			                enc3 = enc4 = 64;
			            } else if (isNaN(chr3)) {
			                enc4 = 64;
			            }
			
			            output = output + this._keyStr.charAt(enc1) + this._keyStr.charAt(enc2) + this._keyStr.charAt(enc3) + this._keyStr.charAt(enc4);
			
			        }
			
			        return output;
			    },
			
			    // public method for decoding
			    decode: function(input) {
			        var output = "";
			        var chr1, chr2, chr3;
			        var enc1, enc2, enc3, enc4;
			        var i = 0;
			
			        input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");
			
			        while (i < input.length) {
			
			            enc1 = this._keyStr.indexOf(input.charAt(i++));
			            enc2 = this._keyStr.indexOf(input.charAt(i++));
			            enc3 = this._keyStr.indexOf(input.charAt(i++));
			            enc4 = this._keyStr.indexOf(input.charAt(i++));
			
			            chr1 = (enc1 << 2) | (enc2 >> 4);
			            chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
			            chr3 = ((enc3 & 3) << 6) | enc4;
			
			            output = output + String.fromCharCode(chr1);
			
			            if (enc3 != 64) {
			                output = output + String.fromCharCode(chr2);
			            }
			            if (enc4 != 64) {
			                output = output + String.fromCharCode(chr3);
			            }
			
			        }
			
			        output = Base64._utf8_decode(output);
			
			        return output;
			
			    },
			
			    // private method for UTF-8 encoding
			    _utf8_encode: function(string) {
			        string = string.replace(/\r\n/g, "\n");
			        var utftext = "";
			
			        for (var n = 0; n < string.length; n++) {
			
			            var c = string.charCodeAt(n);
			
			            if (c < 128) {
			                utftext += String.fromCharCode(c);
			            } else if ((c > 127) && (c < 2048)) {
			                utftext += String.fromCharCode((c >> 6) | 192);
			                utftext += String.fromCharCode((c & 63) | 128);
			            } else {
			                utftext += String.fromCharCode((c >> 12) | 224);
			                utftext += String.fromCharCode(((c >> 6) & 63) | 128);
			                utftext += String.fromCharCode((c & 63) | 128);
			            }
			
			        }
			
			        return utftext;
			    },
			
			    // private method for UTF-8 decoding
			    _utf8_decode: function(utftext) {
			        var string = "";
			        var i = 0;
			        var c = c1 = c2 = 0;
			
			        while (i < utftext.length) {
			
			            c = utftext.charCodeAt(i);
			
			            if (c < 128) {
			                string += String.fromCharCode(c);
			                i++;
			            } else if ((c > 191) && (c < 224)) {
			                c2 = utftext.charCodeAt(i + 1);
			                string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));
			                i += 2;
			            } else {
			                c2 = utftext.charCodeAt(i + 1);
			                c3 = utftext.charCodeAt(i + 2);
			                string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
			                i += 3;
			            }
			
			        }
			
			        return string;
			    }
			
			}
			return Base64.encode(str)
			}
		},
		created() {
		},
		mounted() {
			let vm = this
			this.phone = this.getVisitor_tel_name(false);
			this.name = this.getVisitor_tel_name(true);
			this.getQr();
			this.getQrHandle();
			uni.getScreenBrightness({
			    success: function (res) {
			       vm.screenBrightness = res.value
			    }
			});
			uni.setScreenBrightness({
			    value: 1,
			    success: function () {
			        // console.log(vm.screenBrightness);
			    }
			});
		
		},
		
	}
</script>
